## Abstract

This paper analyzes the choice of a technology portfolio by risk-averse firms. Two technologies with random marginal costs are available to produce a homogeneous good. If the risks that are associated with the technologies are correlated, then the firms might invest in a technology with a negative expected return or, conversely, might not invest in a technology with a positive expected return. If the technology with the lower expected cost is riskier than the other technology, then this “low-cost” technology will be eliminated from the firm’s portfolio if the risks are highly correlated. With imperfect competition, the portfolios of firms are different, and the difference in risk tolerance can explain the full specialization of the industry: The less risk-averse firms use the low-cost technology, and the more risk-averse firms use the less risky, higher-cost technology.

## Keywords

Risk aversion Investment Technology mix## Notes

### Acknowledgments

I gratefully acknowledge the support from the Business Sustainability Initiative at European Institute of Finance, and the very helpful comments of the editor Lawrence White.

## References

- Amihud, Y., & Lev, B. (1981). Risk reduction as a managerial motive for conglomerate mergers.
*The Bell Journal of Economics*,*12*(2), 605–617.CrossRefGoogle Scholar - Appelbaum, E., & Katz, E. (1986). Measures of risk aversion and comparative statics of industry equilibrium.
*The American Economic Review*,*76*(3), 524–529.Google Scholar - Artzner, P., Delbaen, F., Eber, J.-M., & Heath, D. (1999). Coherent measures of risk.
*Mathematical Finance*,*9*(3), 203–228.CrossRefGoogle Scholar - Asplund, M. (2002). Risk-averse firms in oligopoly.
*International Journal of Industrial Organization*,*20*(7), 995–1012.CrossRefGoogle Scholar - Awerbuch, S. & Berger, M. A. (2003). Mean-variance portfolio approach. IEA research paper: Energy security and diversity in the EUGoogle Scholar
- Banal-Estanol, A., & Ottaviani, M. (2006). Mergers with product market risk.
*Journal of Economics & Management Strategy*,*15*(3), 577–608.CrossRefGoogle Scholar - Bar-Lev, D., & Katz, S. (1976). A portfolio approach to fossil fuel procurement in the electric utility industry.
*The Journal of Finance*,*31*(3), 933–947.CrossRefGoogle Scholar - Baron, D. P. (1970). Price uncertainty, utility, and industry equilibrium in pure competition.
*International Economic Review*,*11*(3), 463–480.CrossRefGoogle Scholar - Baron, D. P. (1971). Demand uncertainty in imperfect competition.
*International Economic Review*,*12*(2), 196–208.CrossRefGoogle Scholar - Blair, R. (1974). Random input prices and the theory of the firm.
*Economic Inquiry*,*12*(2), 214–226.CrossRefGoogle Scholar - Cronqvist, H., Makhija, A. K., & Yonker, S. E. (2012). Behavioral consistency in corporate finance: Ceo personal and corporate leverage.
*Journal of Financial Economics*,*103*(1), 20–40.CrossRefGoogle Scholar - Dhrymes, P. J. (1964). On the theory of the monopolistic multiproduct firm under uncertainty.
*International Economic Review*,*5*(3), 239–257.CrossRefGoogle Scholar - Diamond, P. A. (1967). The role of a stock market in a general equilibrium model with technological uncertainty.
*The American Economic Review*,*57*(4), 759–776.Google Scholar - Ehrenmann, A., & Smeers, Y. (2011). Generation capacity expansion in a risky environment: A stochastic equilibrium analysis.
*Operations research*,*59*(6), 1332–1346.CrossRefGoogle Scholar - Fan, L., Hobbs, B. F., & Norman, C. S. (2010). Risk aversion and co\(_2\) regulatory uncertainty in power generation investment: Policy and modeling implications.
*Journal of Environmental Economics and Management*,*60*(3), 193–208.CrossRefGoogle Scholar - Haruna, S. (1996). Industry equilibrium, uncertainty, and futures markets.
*International Journal of Industrial Organization*,*14*(1), 53–70.CrossRefGoogle Scholar - Humphreys, H., & McClain, K. (1998). Reducing the impacts of energy price volatility through dynamic portfolio selection.
*The Energy Journal*,*19*(3), 107–132.Google Scholar - Leland, H. (1972). Theory of the firm facing uncertain demand.
*The American Economic Review*,*62*(3), 278–291.Google Scholar - May, D. O. (1995). Do managerial motives influence firm risk reduction strategies?
*The Journal of Finance*,*50*(4), 1291–1308.CrossRefGoogle Scholar - Meunier, G. (2013). Risk aversion and technology mix in an electricity market.
*Energy Economics*,*40*, 866–874.CrossRefGoogle Scholar - Nance, D. R., Smith, Clifford W., & J., & Smithson, C. W. (1993). On the determinants of corporate hedging.
*The Journal of Finance*,*48*(1), 267–284.Google Scholar - Neuhoff, K., & De Vries, L. (2004). Insufficient incentives for investment in electricity generations.
*Utilities Policy*,*12*(4), 253–267.CrossRefGoogle Scholar - Okuguchi, K. (1977). Input price uncertainty and the theory of the firm.
*Economic Studies Quarterly*,*28*, 25–30.Google Scholar - Roques, F. A., Newbery, D. M., & Nuttall, W. J. (2008). Fuel mix diversification incentives in liberalized electricity markets: A mean-variance portfolio theory approach.
*Energy Economics*,*30*(4), 1831–1849.CrossRefGoogle Scholar - Sandmo, A. (1971). On the theory of the competitive firm under price uncertainty.
*The American Economic Review*,*61*(1), 65–73.Google Scholar - Sharpe, W. (1991). Capital asset prices with and without negative holdings.
*The Journal of Finance*,*46*(2), 489–509.CrossRefGoogle Scholar - Stewart, M. (1978). Factor-price uncertainty with variable proportions.
*The American Economic Review*,*68*(3), 468–473.Google Scholar - Tessitore, A. (1994). Market segmentation and oligopoly under uncertainty.
*Journal of Economics and Business*,*46*(2), 65–75.CrossRefGoogle Scholar - Wambach, A. (1999). Bertrand competition under cost uncertainty.
*International Journal of Industrial Organization*,*17*(7), 941–951.CrossRefGoogle Scholar - Wolak, F., & Kolstad, C. (1991). A model of homogeneous input demand under price uncertainty.
*The American Economic Review*,*81*(3), 514–538.Google Scholar - Zakamouline, V., & Koekebakker, S. (2009). Portfolio performance evaluation with generalized sharpe ratios: Beyond the mean and variance.
*Journal of Banking & Finance*,*33*(7), 1242–1254.CrossRefGoogle Scholar